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| Green Lantern #21 | ||
| DC Comics, 6/63 | ||
| John Broome and Gardner Fox stories | Origin and 1st appearance of | |
| Kane, Giella and Anderson art | Doctor Polaris (Neil Emerson). | |
| Gil Kane and Murphy Anderson cover | ||
| Books | CGC Label | CGC Total | Avg. Grade | 10 | 9.9 | 9.8 | 9.6 | 9.4 | 9.2 | 9.0 | 8.5 | 8.0 | 7.5 | 7.0 | 6.5 | 6.0 | 5.5 | 5.0 | 4.5 | 4.0 | 3.5 | 3.0 | 2.5 | 2.0 | 1.8 | 1.5 | 1.0 | 0.5 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 BOOK | Universal | 236 | 6.75 | 0 0.00% | 0 0.00% | 2 0.8% | 3 2.1% | 12 7.2% | 12 12.3% | 15 18.6% | 21 27.5% | 15 33.9% | 29 46.2% | 22 56% | 16 62% | 13 68% | 20 76% | 14 82% | 15 89% | 13 94% | 6 97% | 1 97% | 3 98% | 0 98% | 0 98% | 0 98% | 1 99% | 3 100% |
| 1 BOOK | Restored | 6 | 5.08 | 0 0.00% | 0 0.00% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 1 16.7% | 0 16.7% | 1 33.3% | 0 33.3% | 1 50% | 0 50% | 0 50% | 1 67% | 0 67% | 0 67% | 1 83% | 0 83% | 1 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| 1 BOOK | Signature | 3 | 6.83 | 0 0.00% | 0 0.00% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 1 33.3% | 1 67% | 0 67% | 0 67% | 0 67% | 0 67% | 1 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| 1 BOOK | Qualified | 1 | 5.50 | 0 0.00% | 0 0.00% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 0 0.0% | 1 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% | 0 100% |
| Green Lantern #21 (1963, DC Comics) CGC Universal Grade Distribution | ||||||||||||||||||||||||
| 0% 0 10 | 0% 0 9.9 | 1% 2 9.8 | 1% 3 9.6 | 5% 12 9.4 | 5% 12 9.2 | 6% 15 9.0 | 9% 21 8.5 | 6% 15 8.0 | 12% 29 7.5 | 9% 22 7.0 | 7% 16 6.5 | 6% 13 6.0 | 8% 20 5.5 | 6% 14 5.0 | 6% 15 4.5 | 6% 13 4.0 | 3% 6 3.5 | 0% 1 3.0 | 1% 3 2.5 | 0% 0 2.0 | 0% 0 1.8 | 0% 0 1.5 | 0% 1 1.0 | 1% 3 0.5 |
| cgcdata.com, last updated September 16, 2025 | ||||||||||||||||||||||||